Electrical switch.



A. P. NICHOLS.

ELECTRICAL SWITCH.

APPLICATION FILED MAB.29,1911. RENEWED MAY 4, 1912.

Patented Dec. 17, 1912.

2 SHEETSSHEET l IN YE N 70/? I la.

Andrew R 8) W Eu a;

WITNESSES rr an A. P. NICHOLS.

ELECTRICAL SWITCH APPLIOATION FILED MAR. 29, 1911. RENEWED MAY 4, 1912. 1,04'?,277.

Patented Dec. 17, 1912.

2 SHBETS-SHEET 2.

IN YE N TOR Andrew P x'cfials a! Y A T TOR/V5 Y w/ rlvzascs ANDREW P. NICHOLS, OF SEATTLE, WASHINGTQN.

ELECTRICAL SWITCH.

Specification of Letters Patent.

Patented Dec. 17, 1912.

Application filed March 29,1911, Serial Ho. 617,713. Renewed May 4, 1912. Serial No. 695,324.

To all whom it may concern -Be it known. that I, ANDREW P. NicrroLs, a citizen-of theUnited States, and resident of the city of Seattle, in the county of Kin and State of Washington, v have lnvente certain new and useful Improvements 1n Electrical Switches, of which the following is a specification.

My invention relates to improvements in electric switches of that typev which are ordinarily called quick throw, 1 that 1s,- switches which have a delayed movement, but which are thrown under the influence of a spring when they do start. g

My invention comprises the novel parts and combinationsof parts which'wlll be hereinafter described and particularly pointed out in the claims. v

The object of my invention is to improve and simplifysuch devices. s

In the accompanying I shown my device in the forms which 'are v preferred .by me.

- r gipre l'show's the switch mechanism in fltlevatronfiom a side edge view, the casing *being in section just within the edge-r- Fig. 2 is a froiitgelevation, the front of the casin lieing r'e'niovem' or upon the line X, X, 0 Fig. Lt-P FigBTt'isa' similar elevation from the 0pp tedirec t-ion, or on the linesY, Y, ofl ig:; fig' t;-i's a central sectionithrough the -op crating.--partsof the switch; Fig. 5 ,is a side elcvationof one of the frame plates upon A-vhich theswitch mechanism is mount ed. switch l2ars'; --1 i,g. 7 is a side elevation and; Fig. .8 a face-elevation of the drumcase to which most of'thc operating parts are secured. Figs. 5) and 10 are elevations from" different view points of one of the detents or pawls. Figs. 11 and 12 are respectively fa e and edge views of the cam ring by which the pawls are released. I igs. 1?) and H are similar views of the spring.

The casing A which incloses the operative parts of theswitch may be of any suitahle construction. I have shown ametal frame having insulating plates ll, inclosing the switch bars and the parts which are immediately connected thereto, including the leads 1h, 17 and the clips 7. I have shown two sets of bars 2 adapted to be connected between the clips 7 which are in turn connected with the leads. 'llu-sc cli 'is orjaws 7 are each made of a single piece of metal, bent upon itself, clearly shown drawings I have i in the edge view, Fig. 1,. The ends are separated sufficiently to accommodate the ends .e.

of the bars 2, and, to prevent sticking of] the bars when thrown into place, I have given then an enlarging curve at the point where the. separated ends 71 join the, opposite end, where the two sides are in con-, tact.

In this way there can be no wedging when the arms 2 jaws 'Zl.

The operating mounted upon two plates 1, one of which is shown in plan in Fig. 5. secured to the main frame A, by.b0lts,at 1().

liar or journal C of the switch are thrown between the These plates are I 10 In the holes 13 is mounted the central pivot throwing '65 parts of the switch are I mechanism. Two disks 3 and 30 fit over this; journal. .The disk 30 has a central sleeve 31v integral therewith and surrounding; the

journal C, The journal andboth disks are secured against rotation by; a pin key? 22 s l which engages all of them. The dis 'Iand 30 are further connectedfby a pin or'.

red 34, this lying withinaslight protuberance or'cam pro ection of the disks. These 1 disks are placed outside the frame plates 1. Just within the frame plates 1 are two;

cam tuberance 50 adapted to act as a cam to reilease the detents 6. The detents 6, shown in detail in Figs. 9 and 10, each has a-sidc plates 5, each of which has a slight pro projecting wing 60 adapted to engage a notch 33 in one or the other of plates 3 or 30 as'the case may be. 'ThiS wing 60and the retaining screw 61 slide in a, slot 12 in the 1frmne" plate 1. The dctent is held 'up into lockmg position by a spring 63 which enters aslot 2 in the lower end ofthe deteht. i

There are two detents,.0n'e on eachside, each preventing turning of the switch in its respective. direction until the detent has first been released. The frame platesl'have two shoulders, 14 and 15, with which the pin or bar 34 engages to prevent ovcrtravcl of the switch liars, and holding against movement oppositely to the dclcnts. The cam disksm'i" have-their cam projections so placed that when they are turned they will not engage and release the detents until they have been turned through a considerable angle.

llclwccn the cam disks is placed a drum case, shown separately in Figs. 7 and 8;

This case has a toothed segment 40, extending about. half way around it. It also has two slots 4| and 42 at opposite ends. VVithin the case. 4 and about the central journal C, is a coiled spring 51 having ends '52 projecting, one through slot 41 and the other through slot 42 and projecting a sufficient distance to engage the pin 34:, one at each side thcreofi Normally, that is in a position of rest, these spring ends engagethe adjacent ends of the slots 41 and 42; \Vhen the casing is turned, one end of the spring will be carried by the drum away from the pin 34, thus putting additional tension upon the spring. the cam disks 5 are secured toturn with the drum, one of these will engage the. detent which is holdingthe disks 2) and and free it, whereupon these disks and the attached bars will be quickly thrown to their other position, between the jaws orinto the open position, as the cas may be. 7 r

'ihe jaws are secured to the disks 3 and 30 by i'neaiis'ot'pins which pass through in-' sulatiii bushin s" 20 iii the 'aws. Disks 9 ,of mica or other insulating material are placed between the aWsQ and the plates at each side thereof. I also place a ,Strip ot' niica- .72 centrally"between the jaws and clips.

The turning of the switch niay be by any suitable i'ueclianisi'ii. The niechanisiii here n shown consists ofa gear 82 which i eshcs,

with the segment gear-4O on the driini case "4, and a gear S1 nzo'untedon the shaft 8, which shaft may be provided with a handle 80,, ifrtli'e switch is to be t'lirowii directly by hand, or may connected with an y other-mechanism? w \Vhat I claim as my invention is: 1. In an electric'switch', in combination, two disks connected by a central 'sleeverand bya "pin near their outer edges, dete'nts adapted to engage said disks to prevent their a' ws for rec'eivingsaid blades, a. hollow drum.oi= cyli nder between said disks, cain disks closing the ends of said druni and having peripheral caiii projections adapted to free the detents, a spring within said drum having its ends projecting and respectively =en'giging opposite sides of the pm which connect the first mentioned disks, aiul nieansfor turiiing tlie drum.

2. In an electric s\-vitcli, in combination, a central journal, a,-sleeve inounted to turn upon said journah'a d-isk secured to each turning, switch'bla'des secured to said disks,

end of said sleeve and each having a looking notch in its periphery, detents adapted to engage said notches to .hold' the disks in two positions, switch blades secured to swing with said disks, 3, pinconnecting said disks near their edges, cain disks journaled on said sleeve and adapted to free the other disks from the detents, aho llo'w drum connecting said cani disks and surrounding said sleeve, said drum having a slot in each end, said slots extending peripherally in opposite directions from a common point, a hell cally coiled spring about said sleeve and within the drum, the ends of said spring projecting from said slots and engaging opposite sides of the pin which connects the blade carrying disks, and means for turn ing said druni.

3. In an electrical switch, in combination, two fraine plates, means for securingfthese plates together in separated position, apivot ;nurnal having supportlinfsaid plates, a sleeve surrounding said fournal, two disks secured to the ends of said-sleeve outside of the frame plates and having portions extending beyondth'e frame plates, a pin connecting the'pa-rts of said disks ia'l1 i( ;l e;-v -tend beyond the frame plates, said frame plates having shoulders adapted to be en gaged by said pin to limitthe extent of swing of said disks, switch blades sccured to said disks, jaws adapted to receive said blades, detents' adapted to enga e said disks to lock 'tlieiincam disks mounted toroclr upon saidsleeve and located at the inner sides of the frame plates, said cam disks adapted-to'free the detents', ahollow secured to andf connec'tiiig the cam Vtl'a'shington, this 24th and having, two peripheral slotsex 

